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Finite size effects on the collective oscillations of a trapped Bose gas
Francesca Zambelli, Sandro Stringari
Sum rules are used to calculate the corrections to the hydrodynamic collective frequencies of a harmonically trapped Bose gas at T=0, due to finite size effects. We show that, with…
Helium nanodroplets and trapped Bose-Einstein condensates as prototypes of finite quantum fluids
F. Dalfovo, S. Stringari
Helium nanodroplets and trapped Bose-Einstein condensates in dilute atomic gases offer complementary views of fundamental aspects of quantum many-body systems. We discuss analogies…
Vortex nucleation and quadrupole deformation of a rotating Bose-Einstein condensate
M. Kraemer, L. Pitaevskii, S. Stringari +1
Using a semi-analytic model based on the Thomas-Fermi approximation, we investigate the relevance of the quadrupole deformation of a trapped Bose-Einstein condensate for the nuclea…
Thermal vs quantum decoherence in double well trapped Bose-Einstein condensates
L. Pitaevskii, S. Stringari
The quantum and thermal fluctuations of the phase are investigated in a cold Bose gas confined by a double well trap. The coherence of the system is discussed in terms of the visib…
Momentum transferred to a trapped Bose-Einstein condensate by stimulated light scattering
A. Brunello, F. Dalfovo, L. Pitaevskii +2
The response of a trapped Bose-Einstein condensed gas to a density perturbation generated by a two-photon Bragg pulse is investigated by solving the time-dependent Gross-Pitaevskii…
Collective Excitations of a "Gravitationally" Self-Bound Bose Gas
S. Giovanazzi, G. Kurizki, I. E. Mazets +1
We investigate the collective excitations of an atomic Bose-Einstein condensate in the self-binding regime produced by electromagnetically induced ``gravity'' (1/r attraction). Ana…